The nonradiative changeover costs Stick to the system WNR = W (0) exp(-alphap), in which p is the volume of phonons matching the Vitality hole. The nonradiative changeover prices of Er3+ show temperature dependence consistent with the multiphonon rest principle. In Tm3+ the temperature dependence of nonradiative peace prices is https://raymondnrqot.post-blogs.com/54120478/5-essential-elements-for-er-yb-yab-crystal